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| Status |
Public on Jan 01, 2013 |
| Title |
Heme utilization in the Caenorhabditis elegans hypodermal cells is facilitated by HRG-2 |
| Organism |
Caenorhabditis elegans |
| Experiment type |
Expression profiling by array
|
| Summary |
The roundworm Caenorhabditis elegans is a heme auxotroph that requires the coordinated actions of HRG-1 heme permeases to transport environmental heme into the intestine and HRG-3, a secreted protein, to deliver intestinal heme to other tissues including the embryo. Here we show that heme homeostasis in the extraintestinal hypodermal tissue is facilitated by the transmembrane protein HRG-2. Systemic heme deficiency upregulates hrg-2 mRNA expression over 200-fold in the main body hypodermal syncytium hyp 7. HRG-2 is a type I membrane protein which binds heme and localizes to the endoplasmic reticulum and apical plasma membrane. Cytochrome heme profiles are aberrant in HRG-2 deficient worms, a phenotype that is partially suppressed by heme supplementation. Heme-deficient yeast strain, ectopically expressing worm HRG-2, reveal significantly improved growth at submicromolar concentrations of exogenous heme. Taken together, our results implicate HRG-2 as a facilitator of heme utilization in the C. elegans hypodermis and provide a mechanism for regulation of heme homeostasis in an extraintestinal tissue.
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| |
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| Overall design |
Two experimental groups: Group 1: three 4um Controls vs. three 4uM hrg-2 Mutants; Group 2: three 20um Controls vs. three 20uM hrg-2 Mutants
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| Contributor(s) |
Chen C, Samuel TK, Krause M, Dailey HA, Hamza I |
| Citation(s) |
22303006 |
| Submission date |
Dec 15, 2011 |
| Last update date |
Jul 06, 2016 |
| Contact name |
WeiPing Chen |
| E-mail(s) |
weipingChen@niddk.nih.gov
|
| Phone |
301-496-0175
|
| Organization name |
NIDDK/NIH
|
| Department |
GCL
|
| Lab |
Genomics Core Lab
|
| Street address |
Bldg 8, Room 1A11, NIDDK/NIH
|
| City |
Bethesda |
| State/province |
MD |
| ZIP/Postal code |
20892 |
| Country |
USA |
| |
|
| Platforms (1) |
| GPL200 |
[Celegans] Affymetrix C. elegans Genome Array |
|
| Samples (12)
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| Relations |
| BioProject |
PRJNA151347 |
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